CEACAM5 and neoplasm: For instance, patients with elevated tumor markers such as CA125 (≥ 30.2 U/mL) and CEA (≥ 10 ng/mL) experienced notable survival improvements when immunotherapy was included in their treatment regimen (HR = 1.97, 95% CI: 1.10–3.29, and HR = 2.50, 95% CI: 1.45–4.32, respectively).